Not this again. 
I had a thought to write something, but another forum I visit has recently gotten over the whole D800E vs. MF bug, and I'd rather ignore this subject for a while.
I'll just say this - Instead of using phrases like "from what I hear", try the thing out for yourself, maybe you'll like it; I know people who own both and like both for different reasons. I myself would prefer to get into MF at the 60mp level, so I've been testing decidedly higher-end solutions as of late, but it would never be a replacement for a DSLR either.
notastockpikr wrote in post #16353284
I use the Zeiss 21/2.8 on the 1Dx and it manually focuses very well. Even the focus confirmation on the 1Dx with my Zeiss lenses is very accurate. So, I wouldn't make a blanket statement that DSLR's don't have have a workable manual focus system unless you have actually tried to focus manually with your DSLR.
I wouldn't be surprised if it's easy to focus, seeing as you don't really need to focus a 21mm lens. I'm a big nut where it comes to vintage manual focus lenses, so maybe I'm just being a snob, when I said "workable" I mean usable for consistently getting in-focus images of a moving subject that you have no opportunity to re-shoot.
I also disagree that "any modern prime" can have comparable IQ at f/8. The color rendition, micro-contrast and sharpness of Zeiss lenses sets them apart and it's not just sharpness.
Zeiss lenses do indeed have superior micro-contrast that makes them apparently sharper (acuity), but that doesn't actually make them resolve more detail where resolution is concerned. A Canon 100L macro and the Zeiss 100MP look basically identical even at f/2.8 on a test chart, but different in practice, however I'm talking from an objective point of view, where things like color don't matter.
Maybe the confusion is in the word "modern", by which I didn't simply imply "made in 2013", because is there plenty of crаp made even today; but the very best we have available today.